Electric-bell attachment for pianos.



R. A. BESSINGER.

ELECTRIC BELL ATTACHMENT FOR PIANOS. APPLcATloN F|L1DJu|.\f16,1915.l

1,168,846, 'Patented Jan.1s,1916.

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` Copies of this patent may be obtained for centran snare Prnir anion,

no'innr A. Bnssrnonm lor WELLINGTON, oi-rio.

ELECTRIC-BELL ATTACHMENT FOR PIANOS.

Specification of Lettersv Patent.

`Applicaation led'luly k11G, 1915. Serial No. 40,177.'

To all whomc' may concern: 4

Be it knownk that l, ROBERT A. BnssINGEii, citizen of the United States,residing at 1W ellington, in the county of Lorain and State of Ohio,have invented certain new and useful improvements in Electric-BellAttachments for Pianos, of which the following kis a specication.

This invention relates toelectric bell attachments 4for pianos, and hasfor its 'object y to provide an improved apparatus which can be'quicklyapplied to any piano, and which` can be easily transported for usewherever desired.

The device includes a casing containing a seriesof contact pins which,when the casing is attached to the piano, rest upon the keys, and when akey is struck the pin resting thereon drops and closes a circuit whichsounds a corresponding bell.

The device'is villustrated in the accompanying drawings in which- Figure1 is a perspective thereof, partly in section. Fig.` 2 is a sectionaldiagram showing the circuits. Fig. 8 is a front elevation. Fig. flis adetail in cross section.

ln thev drawings, 6 Vindicates the white keys and 7 the black keys of apiano.

10 is acasing which extends across the `key board, being supported abovethe same by means of hangers or brackets.` The cas ing may be made ofmetal with a lining 1.0a of wood or `other material. Each of thebrackets consistsv of an upper member 8 andy ay lower member 8a.. Theformer is slotted as indicated at 8C and the lower member may beadjusted by ineansof the slot and a screw 9 extending through thesaine.. The lpart 8a is secured to thecasing 10.'- rillhe part 8 has ahook 8 at the top which engages over the lfall board 11 when the latteryis raised. as

casing in position rabove the keys. llfithin the casing are a numberv ofpins 12 which rest upon the keys, said pins exshown in 1,- therebysupporting the tending through holes in the bottom of the i casing.IThese pins lift and'drop as the keys are raised and lowered, and whenthey drop they Contact.v with two terminals 13 consisting of 'screws on`the like, located `within the casing in position to be bridged bythe'head of the ypin 12, which` closes .the v.

circuit'of the corresponding bell. The points 13 on one side areconnected in series with a'line lei to battery 22 and switch 23. Thepins 13 on tne'other side are connected respectively by branch lines 15,16, 17. 18, 19,

and 21 to the vibrators 9A; of `the bells 25. 'lhe'number of bells maybe varied as deu fsired; riEhe wires are preferably assembled in a loom:26.

From the above description it is obvious :the casing above the keyboard,contact devices in the casing, including pins depend ing from the casing,and resting on the keys to .lift and drop therewith, and. bells incircuit with said devices.

2. A n electric bell attachment for pianos, comprising, in combination,a casing'adapted to entend across keyboard, adjustable hangers for thesame, having hooks at 'their upper ends engageable with the fall board.of a piano, contact devices supported by said casing and including pinsresting on the keys and` operated thereby, and bellsy in circuit withsaid devices.

8. i'i'i electric bell attachment forpianos,

comprisingin combination a casing extending'. across the keyboard,headed pins depending' through the casing and resting on the keys,contacts supported in the casing under the heads of the pins andladapted to be bridged thereby when the pins drop, and bells in circuitwith said contacts. 1

In testimony whereof, l aflir: my signature in presence of twowitnesses. f

sonner n. nnssineiiii.

\ Witnesses:

JOHN A. BOMMHARDT m 7 HARRY A. iiiioirrson.

ve cents each, by addressing the Commissioner of Patents,` Washington,13.10.

r Patenten aan. is, isis.

comprising, in combination, a casing, sup-

